Home / 3,908.39-5,393.55-2,139.99

Finding the Fourth Proportional to 3,908.39, 5,393.55 and 2,139.99

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Solution

The fourth proportional to 3,908.39, 5,393.55 and 2,139.99 is: 2,953.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.39 : 5,393.55 = 2,139.99 : x
  2. Step 2: Convert to fraction form
    3,908.39/5,393.55 = 2,139.99/x
  3. Step 3: Cross multiply
    3,908.39x = 5,393.55 × 2,139.99
  4. Step 4: Simplify right side
    3,908.39x = 11,542,130.86
  5. Step 5: Solve for x
    x = 11,542,130.86/3,908.39
  6. Step 6: Final answer
    x = 2,953.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.